Cream-separator.



S. C. ANKER-HOLTH.

CREAM SEPARATOR,

'PLICATION FILED FEB. 13. 1914.

Patented Jan. 16, 1917.

INVENTQR ATTORNEYS SEVEBINQ. ANKER-HOLTH, 0 PORT HURON, MICHIGAN.

CREAM-summon.

To all whom it may concern:

- Be it known that I, SEVERIN C. Annea- HoLTn, a citizen of the United States, and a resident of Port Huron, in the county of St. Clair and State of Michigan, have invented certain new and useful Improvements in Cream-Separators; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to that class of cream separators or centrifugal machines having a rotary bowl provided with disks or similar elements and adapted to be used for separating liquid 'of d'iflerent specific gravity, such as cream or butter fat from milk, or the lighter from the relatively heavy portions of material to be operated upon or treated.

V The principal object of the invention is to provide a simple, economicahefiicient and sanitary cream separator.

A further object is to provide means whereby the incoming liquidor whole milk will be causedto passthe' lighter liquid or cream contained in the bowl without mate-- rially disturbing the cream, and to enable the milk to be distributed in the separator in -such a manner that it will be freed from dirt or other heavy particles or foreign substances and separated from the cream or butter fat in an efficient mannor,'so that a smooth uniform creamwill be obtained and the skimmed milk which escapes from the bowl will be practically free from butter fat. A further object is to provide means whereby the incoming milk will be caused to move at a speed which is at first'much slower than the speed of rotation of the bowl and gradually increases with respect to the speed of the bowl,-and whereby channels will be formed within or through the liquid containedjin the bowl for the passage of the separated cfreaim further object isto provide means whereby clogging of the "separator under ordinary condltionsand temperatures will be revented, eventhough tlie'ci'eam'screwmay 'liavebeen t urnedintoofar. a

Other and further objects of the invention will appear from an examination of the following. description and claims and from an inspection ofthe accompanying drawings, which are made a parthereof.

Specification of Letters Patent.

the peripheral Patented-Jan.-16, 1917.

Application filed February 13, 1914. Serial No. 818,596.

The invention consists in the features,

combinations, and ,details of construction herein described and claimed.

In the accon'ipanying drawings, l igure l is a view'of a bowl shell constructed in accordance 'with my invention, showing onc half of the bowl shell including the hollow shaft and dirt chamber in horizontal section, at the left of the figure, as it would appear taken on line 1 of Fig. 2 looking downward, and showing the other half of the bowl as it would appear withthe top or tion taken through the center of the bowl. as -it would appear taken on line Q'of Fig. 1

looking in the direction of'the arrow.

In constructing a cream separator having a bowl made in accordance with my invention, I provide a bowl (1, which, in the form shown in the drawings, comprises a main body portion a havmg peripheral walls I,

an end wall c, and a bowl bottom or romovablecnd member (I forming a. separator chamber 0. The end wall a is integral with walls ofthe casing or bowl shell, and the other end member of the cas ing is provided with a peripheral, laterally projecting flange f adapted to engage the edge or rim of the main body or peripheral wall of the bowl shcll. An inner flange or peripheral portion 1 of the removable bowl member is adapted to engage the inner surface of the peripheral wall of the bowl shell, and a packing ring it of compressible material is interposed between said inner rim 1 and the part I) in a groove '1', so as toform a liquid tightjoint between. the bowl mem: ber cl and the mainbody of the 'bowl shell.

Separator disks or plates l i, whichare conbosses m and provided with openings n at or near their peripheries.

A central hollow shaft or tubular core member 0 is mounted at the center of the bowl shell and is by preference, made in one integral piece with one of the end wall portions or end members of the bowl shell. In the form shown in the drawings, this hollow shaft or central member is made integral with the bowl bottom member (I and is provided with a longitudinal central or axial opening p therethrough or in at least the upper part thereof. The axial opening in the lower portion of the shaft is tapered or suitably formed and adapted to fit snugly upon and in fixed relation to an upright rotary s indle or shaft 9 of a cream separator. The siaft q is mounted in suitable flexible bearings (not shown) and is adapted to be operatively connected with suitable driving mechanism of a cream separator and forms a part of a cream separator which may be of any desired, ordinary or well known form.

A cream screw is rotatably mounted in threaded engagement with the bowl shell at or near one end thereof and provided with an opening 8 through said screw adapted to form a cream-outlet opening, the open inner end 8' of said cream screw and the outlet opening formed thereby being adapted. to communicate with the space located at or near the central portion of the'bowl and in which the cream accumulates in the operation of separating cream from milk. i peripheral slot or opening t is provided in the hollow shaft adjacent to the cream screw and is located in position to communicate with the opening formed by the cream screw. This slot or recess leads downward toward the cream screw or creaun-outlet from a point encircled by or inside of the inner edges of adjacent separator disks, through the entire series of which the hollow shaft extends. Similar peripheral creamoutlet openings or grooves 11, in the hollow shaft and leading downward on the inside of the inner edges of the disks, communicate with cream-outlet openings 'v in the end member or wall (I of the bowl, so as to form overflow openings adapted to permit cream to pass out through the openings '0, when the capacity or position of the cream screw or the condition of the cream is such that all of the cream required to pass out will not pass through the cream screw with sntlicicnt facility to enable the best results to be accomplished. The opposite end portion or end wall of the bowl shell is provided with milk-outlet openings 1 located at the inner extremity of radial milk-outlet passages which lead inward from the inner peripheral portion of the bowl shell adjacent to the outer peripheral edges of the disks to said milk-outlet openin y.

The hollow shaft or central tubular member o of the bowl is provided with lateral openings 2 which lead from the inner axial opening and communicate with the interior of the separator chamber and with the interior of a dirt chamber and form lateral or radial inlet openings for the incoming milk to pass through. The dirt chamber is formed by a. lower truncated cone shape cup or inner casing portion 3 and a cover 4; said inner casing and covering being provided with central openings through which the hollow shaft extends. The inner casing members 3- and 4 are so arranged that the inner casing formed thereby engages the upper or adjacent separator disk and is located between said disk and the'end wall or top portion 0 of the bowl shell. Lateral accelerator wings or blades 5' project outward laterally and rearward from the periphery of the hollow shaft at an angle at suitable intervals, and are made, by preference, integral with -the hollow shaft and bowl bottom member, said wings being arranged in position to extend laterally and rearward into the lateral grooves or openings 1 in the separator disks and upward and downward along the periphery of the hollow shaft or tubular member 0 and between the latter and the grooved inner edge portions of the disks through the entire series of disks or se )ara tor plates. Each of said wings or bla es is curved or bent outward and rearward with respect to the direction of rotary movement of the bowl shell and hollow shaft, so that each wing or blade has a curved or concave rear surface portion or' rcarwardly facing side 6, and a convex surface or curved front side 7 which faces forward and outward in the direction of rotation of the bowl and hollow shaft, en the bowl is in operation. The outer portion of each wing or accelerator blade thus extends between the peripheral wall of the bowl shell and a peripheral surface portion of the hollow shaft located back of the base of the wing, or back of the radial line or plane in which the base of the wing is located and attached to or in engagement with the hollow shaft, thus forming a channel 8 directlv back of each win", which channel is within the hollow of t ie wing or in the form of a vertical longitudinal groove or channel having its forward side at the. back of the win which forms a forward and outer wall of the channel, the inner wall of the channel being formed by the hollow shaft. The channels r spaces 8 thus formed directly back of the concave or i'earwardly facing curved sides of the blades and between said concave sides and the adjacent peripheral surface of the hollow shaft, are adapted to permit the cream to pass downward directly back of the concave rcarwardly and inwardly facing rear surfaces or sides of the wings and between the outer rcarwardly extending porcream,

'cated just in a high speed, in such'a manner as to enable the incoming milk which at against the front convex faces of the wings to be thoroughly distributedwithout unduly agitating or disturbing the lighter liquid or particularly that portion of the cream which passes downward in the Vertical channels or spaces 8.

he inner end of' the cream sc ew is 10- advance and close to the inner edge or base and the forwardly facing convex side of an accelerator wing or blade and endwise beyond the ends of the'bl'ades and I elow and in position to communicate with the space between a of the blades,

and the creanroutlet or overflow passages u are also between the blades or wings and, by preference, close to the forwardly facing or convex sides of the adjacent accelerator blades, as indicated in Fig. 1.

he upper and lowe shell are removably bowl bottom member a; gested, and

center of the bowl and through the central or upper. bowl shell member, the upper or outwardly projecting i I endv of the hollow shaft being threaded and through, which connnunicatewith the'milkf outlet openings 7 of the adapted to permit the passage of skimmed milk from the interior of tl provided with a threaded not 9 located on the outside of the bowl shell and in threaded engagement with said hasyopeni'ngs-l0 therc-.

projecting end of the he'nut 9 bowl shell, and are e bowl shell.

'Each accelerator blade'fi is provided with an'opening or passage adapted to permit the passage of liquid from the front to the passcsthrough the rear sides of the blades and to the cream outlets without going aroundthe outer latcral edges or top edges of the blades. These passages 5" may be between the bottomends of the blades and the bowl bottom, as indicated in Fig. 2, or at any desired point in the blade intermediate the outer lateral edge of the blade and the axial center of the bowl, or ncarer'to the axial centerot' the bowl than are the outer edges of the blades. Y

In operation, the bowl is revolved at a high speed in the direction indicated by the arrows in Fig. l. The milk enters through the central opening at the upper end of the hollow shaft from whence it openings 2, and as the milk at'thc start has no circuinferential speed while the hollow shaft with its accelerator wings and the restv (if the bowl rcvolvc at a high speed, it iollo that the incoming milk will press against the front first presses 4 is slower, will 'those portions which move inward between the tend to find tl extends upward through-the the separator the bowl 18 very great-1n practice ordinarily exin working its way back toward the middle of the bowl where the circumferential speed go faster than the wings and I gather behind or in the hollows or vertical channels 8 in or back of the curved accelerator wings 5 along which it passes downward and escapes out through the opening in the cream screw 9' or through the overflow openings r it the cream screw r has been turned in too far. Y With the wings constructed as above described, the liquid immediately in front of each wing will be of such density that the cream or liquid of less specific gravity than the milk, particularl or particles of the cream I disks, will ieir way into the spaces or channels 8 back of the wings and pass along the back concave sidesof the wings to the cream-outlet. If the milk contains any dirt or heavy particles, these will be taken up in the sediment chamber 4% The rest of the milk which mainly consistsof water, milk sugar, casein and other protein substances 13 by centrifugal force driven to'theoutside of the disks where the last possible traces of crean'i'or butter fat will be separated from it and the skimmed milk ward through the holes ancarthe outer edge of the disks and between the sediment chamber cover and the bowl-hood and out through the openings at the top of the bowl. The dotted'lincs j in Figs. 1 and 2 indicate the surface of the cream when the bowl is in operation, with the gream screw in the position in which it is shown in full lines. T 1e cream screw'r is shown in the drawings in full lines so far inthat no cream can pass throu h it, thereby forcing all the cream to pass through the overflow or relief openings 1. The cream screw 7'' rily screwed so far out that tially all of the cream passes through it when is in operation. The cream screw is shown in the, last mentioned position in broken'lines in "Fig. 2. The inner edge or mouth a of the hole a in the cream screw, when in position to permit the proper passage of cream through the screw, is as far or farther bowl than the outer edge of any of the overflow openings '1 and the surface 7' of the cream will then be as far away from the axis of'the bowl as the inneredge s of the hole in the cream screw. claim:

l. In a cream separator, the combination of a. rotary bowl shell, a central hollow shaft extending upward and downward on the inis, however, ordinaall or substan- \Vlll thenpass upside of the bowl shell, and laterally projecting wings having their inner marginal portions secured to the hollow shaft, each of said wings extending from the periphery having their inner edges secured to the hollow shaft, each of 21m blades extendin from the periphery of said shaft outward laterally and'having a concave rear surface facing inward toward the axial center and rearward with respect to the direction of rotation of the bowl shell.

3. In a cream separator, the combination of a rotary bowl shell provided with a cream outlet, a central hollow shaft fixed to and extending upward on the inside of the bowl shell and provided with a milk supply passage comnumicating with the interior of the bowl shell, and' lateral accelerator wings rigidly attached to the hollow shaft and extending from the periphery of the shaft outward, and having rear curved surfaces facing inward toward the axial center and rearward with respect to the direction of rotation of the shaft, each of said wings being provided with an opening adapted to permit the passage of liquid from the front to the rear side of the wing.

4. In a cream separator, the combination of a rotary bowl shell having top and side walls and a bowl bottom and provided with a cream outlet opening, a central hollow shaft fixed to the bowl bottom and extending upward therefrom on the inside of the bowl shell, said hollow shaft being provided with a milk supply passage communicating with the interior of the bowl shell above the level of the cream outlet opening, and accelerator blades fixed to the hollow shaft and each having a rear face extending from the periphery of the shaft outward laterally and facing inward toward the axial center and rearward with respect to the point of connection with the shaft and with respect to the direction of rotation of the. bowl shell.

5. In a cream separator, the combination of a rotary separator bowl comprising in its construction a bowl shell having a cream outlet opening, a central hollow shaft on the inside of the bowl shell and provided with a milk supply passage having an openi communicating with the interior of the bow shell, and lateral accelerator blades mounted on opposite sides of a milk supply opening in the shaft and in fixed relation to said shaft, each of said blades having a curved rear face extending from the periphery of the shaft outward laterally and facing inward toward the axial center and rearward with respect to the direction of rotation of the bowl.

6. In a cream separator, the combination of a rotary separator howl comprising in its construction a bowl shell having a cream outlet opening, a central hollow shaft fixed to the bowl bottom and extending upward on the inside of the bowl shell, and rearivardly curved accelerator blades fixed to the hollow shaft and each extending from the periphery of the shaft outward laterally and rearward having a concave rear surface facing inward toward the axial center and rearward with respect to the direction of rotation of the bowl, each of said accelerator blades being provided with an opening located intermediate the outer lateral extremlty of the blade and the axial center of the bowl shell, adapted to permit the passage of liquid from the front to the rearward side of the blade.

In testimony that I claim the foregoing as my invention I atlix my signature in the presence of two witnesses, this 27th day of January A. D. 1914.

SEVERIN C. ANKER-HOLTH.

Vitnesses:

EUGENE C. VANN,-' t HARRY IRWIN CROMER. 

